76 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Cyclosalpa affinis (pi. 3, fig. 10), C. Jloridana (pis. 4, 5, and 6), and 

 C. baked (pis. 7, 8, 9, and 10), arising on each side of the body from 



the last body muscle, 

 and running to the vis- 

 cera. Note, however, 

 that in these Cyclosal- 

 pas this delicate strand 

 arises from the ante- 

 rior branch of the last 

 body muscle while in 

 Apsteinia punctata it 

 arises from the poste- 

 rior branch of this mus- 

 cle. All the body mus- 

 cles are interrupted 

 ventrally. The inter- 

 mediate muscle is pres- 

 ent on each side as 

 a broad band, much 

 longer on one side than 

 the other. The oral 

 and atrial muscles are 

 shown in figures 54 and 

 55, the latter copied 

 from StreifL Observe 

 the asymmetry in the 

 intermediate muscle of 

 the two sides, and the 

 greater length of the 

 oral retractor muscle 

 on one side. 



The gut is a compact 

 "nucleus" (fig. 53). 



The eyes (figs. 56 

 and 57) have been de- 

 scribed by Metcalf and 

 Johnson (1905). They 

 show definite depar- 

 ture from even the most 

 modified Cyclosalpa 



Fig. 54.— Apsteinia punctata, aggregated zooid from the left . VDe fhof of G vivqiila 



SIDE OF THE STOLON, ORAL MUSCULATURE VIEWED FROM THE J " ' V 



inside: A, right side of the body; B, left side of the body, and Conform quite 



x 7 diameters. (Drawn by iioyt s. Hopkins.) closely to that seen in 



the true Salpas. That portion of the large dorsal eye which in the 

 Cyclosalpas we called the plug, and which in Cyclosalpa virgula 



